1
def module_name(ts_name):
2
    if ts_name.endswith(".ts"):
3
        return ts_name.removesuffix(".ts")
4
    if ts_name.endswith(".mts"):
5
        return ts_name.removesuffix(".mts")
6
    fail("Expected TypeScript source file, got " + ts_name)
7
 
8
def js_name(ts_name):
9
    if ts_name.endswith(".ts"):
10
        return ts_name.removesuffix(".ts") + ".js"
11
    if ts_name.endswith(".mts"):
12
        return ts_name.removesuffix(".mts") + ".mjs"
13
    fail("Expected TypeScript source file, got " + ts_name)